Wrench.



No. 747,385. PATENTBD DEC. 22, 1903;

' J. c. DAVISON.

WRENCH.

xPPLIGATIOH FILED MAR. 16,1903.

I0 MODEL,

No. 747,385. '7 iatented December 22, 1903.

UNITED STATES PATENT OFFICE.

JOHN C. DAVISON, OF FRIENDSVILLE, MARYLAND, ASSIGNOR OF ONE-HALF TO ARTHUR OHISHOLM AND GEORGE BROWNING, OF FRIENDSVILLE, MARYLAND.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 747,385, dated December 22, 1903.

Application filed March 16, 1903. $erial No. 148,048. (No model.)

To all wh m i Z/ COW/067%: In operation by reciprocating the nut the Be it known that I, JOHN C. DAVISON, a citiscrew and worm will be rotated, and this will zen of the United States, residing at Friendscause a reciprocation of the rack and the slidville, in the county of Garrett and State of ing jaw, thereby enabling the jaw to be ad- Maryland, haveinvented certain new and usej usted to fit nuts of difierent sizes.

ful Improvements in Wrenches; and Ido de- From the foregoing description, taken in clare the following to beafull, clear, and exact connection with the accompanying drawings, description of the invention, such as will enthe construction, mode of operation, and adable others skilled in the art to which it appervantages of the invention will be readily un- 10 tains to make and use the same. derstood without requiring an extended ex- The invention relates to wrenches of the planation.

sliding-jaw type. Various changes in the form, proportion,

The object of the invention is to provide a and details of construction may be made withwrench of this character which shall be simin the scope of the invention without depart- 15 ple of construction, durable in use, comparaing from the spirit or sacrificing any'of the tively inexpensive of production, and efficien advantages thereof. in action. Having thus fully described my invention,

With this and other objects in View the inwhat I claim as new, and desire to secure by vention consists of certain'novel features of Letters Patent, is

20 construction, combination, and arrangement 1. A'wrench consisting of a handle-bar and of parts, which will be hereinafter more fully a fixed jaw provided with a grooved longitudescribed,and particularlypointed outin the dinal slot and a transverse slot, a tongued appended claims. movable jaw mounted to slide in said longi- In the accompanying drawings, Figure l is tudinal slot toward and away from the fixed 25 a side elevation of the wrench. Fig. 2 is a jaw and provided with a worm-rack, a suitsimilar view with one of the side piecesvreably-journaled screw, a nut for rotating said moved; and Fig. 3 is a cross-sectional view screw and a worm connected to said screw through the sliding jaw, handle-bar, wormand engaging said rack. v

rack, and worm. 2. A. wrench consisting of a handle and 30 Referring to the drawings, 1 denotes the fixed jaw formed of longitudinally-divided 8o handle of the wrench, and 2 the fixed jaw. sections provided with a grooved longitudi- These parts are preferably formed of two nal slot and a transverse slot, atongued movpieces a a, divided longitudinally and united able jaw sliding in said grooved slot and proby screws, bolts, or rivets a The handle is vided with a worm-rack, worm mounted in 5 provided on its under side with a longitudi the transverse slot and engaging said rack, a

nal slot 3and is further provided with a transscrew journaled in the transverse slot and 4 verse slot 4.. connected to the worm, and a nut for rotat- 5 denotes a worm journaled in bearings 6, ing said screw, substantially as described. and 7 denotes a screw journaled at one end 3. Awrench consisting ofahandle-bar hav- 40 in a bearing 8 and fixed at its opposite end to ing a fixed jaw, a longitudinal grooved guidesaid worm. way in one side contiguous to the jaw, and a 9 denotes a nut mounted to slide in the transverse slot above said guideway, parallel transverse slot to rotate said screw, and contherewith and projecting rearwardly beyond sequently the worm. the same, aslidingjaw provided witha tongue 45 1O denotes thesliding jaw, provided with engaging the grooves in the guideway and a longitudinal rib 11, having side flanges 12, having rack-teeth, a worm journaled in the which are adapted to fit and slide in grooves transverse slot above said longitudinal slot 13, formed in the walls of the slot 3. Secured and engaging said rack-teeth, a screw jourto the upper end of said rib is a worm-rack naled in s transverse slot at a point adja- 5o 14., which is adapted to engage the worm 5. cent to thnner end of the guideway and at the rear end of the slot and connected at the former point to the vqorm, and a nut in the rear portion of the transverse slot and adapted to be reciprocated to impart motion to the 5 screw and thence to the worm, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHN C. DAVISON.

Witnesses:

J. W. MOORE, J 0s. VANSICKLE. 

